Once again Amanda Ghassaei has published a great tutorial on the various methods of audio output that can be generated with an Arduino board and some external circuitry. Apart from the usual R-2R DAC that we're used to, Amanda continues on and explains how to buffer the output using an op-amp voltage follower, adding a low-pass filter, DC offset and finally output to a speaker.

This is a very well written and useful tutorial, so do check it out. And for more, we're on twitter and Google+, so follow us for news and product updates as well.